Transcription of CHAPTER 11 EMULSION BREAKING
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CHAPTER 11 EMULSION BREAKING
CHAPTER 11 EMULSION BREAKINGAn EMULSION is an intimate mixture of two liquid phases, such as oil and water,in which the liquids are mutually insoluble and where either phase may be dis-persed in the other. In water chemistry, two types of emulsions are commonlyfound, oily wastewater (oil emulsified in water or O/W emulsions) and waste oilemulsions (water emulsified in oil or W/O emulsions).Oily waste and waste oil emulsions can usually be differentiated EMULSION appears to be just oily, dirty water; a drop of the EMULSION addedto water disperses (Figure a). A W/O EMULSION is usually thick and viscous;a drop of this EMULSION added to water does not disperse (Figure ).
FIG 11.5 The use of organic emulsion breakers in place of alum or salts which form hydrous floes greatly reduces sludge volume. The oil can be extracted from the sludge. Organic demulsifiers are extremely effective emulsion breaking agents, giving more consistent results and producing better effluent quality than an inorganic program.
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